JPS6035821Y2 - gaskotok - Google Patents

Description

[Detailed description of the invention] This invention relates to a gas cock that circulates and shuts off gas fuel passages connected to various gas combustion appliances such as gas stoves, ranges, and stoves, and in particular reduces the gas flow rate from the fully open state to reduce the gas flow rate from the fully open state. This invention relates to a gas cock that has a so-called small flame adjustment function that allows combustion with a long flame.

Conventionally, a known gas cock with a small flame adjustment function has a structure in which the small flame is adjusted by reducing the mutual communication surface between the plug's closing hole and the gas inlet while rotating the plug from the fully open position to the closing direction. By further rotating the plug from the fully open position, that is, the maximum gas flow position, the small flame adjustment groove (seamer groove) formed on the outer circumferential surface of the plug is connected to the gas inlet at one end and the small flame adjustment groove at the other end. A device is known that is connected to a gas passage (seamer passage) to adjust the small flame.

For the former gas cock, visually check the size of the flame)
Adjustment is troublesome and difficult because it requires small flame adjustment, and if the gas used has a large calorific value, the flame length fluctuates greatly with the slightest rotation of the plug, making it difficult to reach the desired value. The drawback was that adjusting the small flame required delicate rotation of the plug.

With the latter gas cock, the small flame adjustment is performed at the maximum rotation position, so the drawbacks seen in the former gas cock can be eliminated; however, the operating shaft of the gas cock rotates excessively until the small flame adjustment position is reached. A stopper mechanism is necessary to prevent the rotation of the operating shaft from occurring when the gas flow rate is fully open, and in particular, a stopper mechanism is required to ensure that the ignition means using a piezoelectric element is linked to the rotation of the operating shaft. However, since a large rotational force is applied to the operating shaft,
A stopper mechanism was essential.

By the way, in conventional gas cocks equipped with a stopper mechanism, when the gas cock is operated in the closing direction,
At an intermediate stopper position, the operating shaft hits the stopper mechanism, and the gas cock cannot be returned to the fully closed position without some sort of release operation, which is extremely inconvenient in terms of gas cock operation.

This device eliminates the drawbacks seen in conventional gas cocks, reliably stops the operating shaft of the gas cock at the full gas flow position, and then automatically releases the stopper mechanism without requiring special operations. The stopper mechanism can be smoothly rotated to the maximum rotational position for adjusting the small flame, and when rotating in the valve closing direction, the stopper mechanism remains inactive during the entire rotation, which may prevent the return rotation of the operating shaft. This will be described in detail below with reference to the drawings.

In the figure, 1 is a gas cock operating shaft, and 2 is an igniter case incorporating a high voltage generator for ignition, the details of which will be described later with reference to FIG. 6.

3 is the cock body of the gas cock, 4 is the outlet for pilot gas for ignition, 5 is the throttle valve for adjusting the small flame, 6 is the gas inlet,
7 is a gas outlet.

A pilot slide core 8 that is slid in the axial direction by the operating shaft 1 is housed in the gas cock body 3 while being prevented from rotating, and a rotary core 9 is placed in front of the slide core 8 to prevent the slide and rotation. be placed freely.

A cam surface having valleys at opposing positions is formed on the inner circumferential surface of the slide core 8, and a slide core pin 10 whose both ends are supported by the cam surface is always supported by a coil spring 11 partially housed within the operating shaft 1. It is energized forward.

As shown in FIG. 14, the rotating core 9 has a ring shape with its centers connected, and an inclined rising wall 9a is formed on the periphery, and a vertical surface 9b of the inclined rising wall 9a is fixed to the cock body 3. This becomes a stopper that comes into contact with the stopper pin 12 that has been moved.

Further, a split groove 13 for receiving the slide core pin 10 is formed at the tip of the operating shaft 1, as shown in FIG.
The groove 13 has a stepped portion 1 that engages with the core pin 10 in the middle thereof.
It has 4.

In order to clearly show the cam surface of the rotating core 9, the rotating core 9 is illustrated while being operated in FIG.

A plug 15 is rotatably housed in the cock body 3, and has a cylindrical body with a truncated conical outer circumferential surface. It is biased by a spring 17 in the valve direction and housed.

As shown in Fig. 7.8.9, a hole 18 communicating between the inside and outside is bored near the tip of the plug 15, and a groove 19 extending almost to the center is formed near the rear end, perpendicular to the axial direction. ,
A seamer groove 20 is spirally formed on the outer peripheral surface, and the hole 18
is the gas inlet 6, and the cut groove 19 is the pilot gas outlet 4.
It is possible to align with each.

Further, the seamer groove 20 has one end freely connected to the gas inlet 6 and the other end freely connected to one end of a seamer passage 21 formed in the wall surface of the cock body 3.

The other end of the seamer passage 21 opens into the cock body 3 at the tip of the plug 15 and communicates with the gas outflow lower.

The small flame adjustment throttle valve 5 faces the seamer passage 21, and the gas flow rate for small flame can be arbitrarily adjusted depending on the type of gas.

The plug shaft 15a extends from the rear end of the plug 15 toward the operating shaft 1.
The plug shaft 15a is loosely inserted into the operating shaft 1, and the slide core pin 10 is engaged in the split groove 22, so that the rotation of the operating shaft 1 and the rotation of the plug 15 are integrally linked. ing.

Further, a hammer actuating hook 23 for actuating the hammer in the igniter case 4 is inserted into the base of the plug shaft 15a so that it cannot rotate.

A spring 24 is provided between the hammer operating hook 23 and the rotary core 9 having the stopper 9b to repel the two in opposite directions.

A pilot valve 26 is provided at the tip of the pilot valve shaft 16 to move toward and away from the valve seat 25 in the plug 15, and the rear end extends into the plug shaft 5a and comes into contact with the central connecting portion of the rotating core 9. It is free.

To operate, first push the gas cock operating shaft 1 3 mm in the direction of arrow A in Fig. 1, and then rotate it 90 degrees to the fully open gas flow position (large fire position) as shown in Fig. 15, and the slide core pin 10 will be operated. The slide core pin 10 is held in a state in which it is pulled against the stepped portion 14 by the tension of the spring 24 and rotational torque.

At this time, the slide core 8, which is allowed to slide only in the axial direction, is moved forward by the rotation of the operating shaft 1 via the slide core pin 11 by a cam on its inner peripheral surface.

As the slide core 8 moves forward, the rotary core 9 moves forward at the same time, and the pilot valve shaft 1 is moved forward at the central connection part.
6 and the pilot valve 26 opens.

As a result, the plug 15 shifts from the blocking position (X state) shown in FIG.
8 are in communication and the gas that has flowed into the plug 15 flows to the gas outflow lower at the maximum gas flow rate when opened at 90° as shown in FIG. 16, and also flows from the kerf 19 to the pilot gas outflow port 4.

In this position, the stopper 9b of the rotary core 9 engages with the stopper pin 12, so that the operating shaft 1 is reliably stopped at the 90° rotation position, which is the conflagration position.

Further, as the plug shaft 15a rotates in conjunction with the 90° rotation of the operating shaft 1, the hammer actuating hook 23 releases the hammer 27 (while resisting the spring) from the piezoelectric element 29, and then releases the engagement with the hammer 27. The piezoelectric element 29 is struck to generate a high voltage, which ignites the pilot flame and the subsequent conflagration.

In this state, as the rotary core 9 moves forward, the stopper 9b and the stopper pin 12 are distantly engaged, and excessive rotation of the operating shaft 1 is prevented.

When a rotational torque is applied to the operating shaft 1, the slide core pin 10 is held by the stepped portion 14,
Although the conflagration gas and the pilot gas continue to flow out, when the rotational force on the operating shaft 1 is removed, the engagement between the slide core pin 10 and the stepped portion 14 is released, and the slide core pin 10 is moved by the elastic force of the spring 24. It retreats within the groove 13 by repelling force.

As the slide core pin 10 retreats, the slide core 8,
The rotating core 9 also retreats, the engagement between the stopper 9b and the stopper pin 12 is released, and the operating shaft 1 returns to its free rotation state again.

As a result, the operating shaft 1 can be rotated from the 90° fully open position to the 140° small flame position shown in FIG. 16, or from the small flame position to the fully closed position. During the operation stroke, the stopper 9b and the stopper pin 12 never engage with each other, allowing free rotational operation.

In the small fire position, the plug 15 shown in Figure 10.11
is in the Z state, and the gas flows through the gas inlet 6 and the seamer groove 2.
0, flows through the seama second passage 21 to the gas outflow lower,
A gas stove can be used with a small flame to maintain heat.

In order to prevent the plastic lug 15 from rotating beyond the small flame position, the hammer actuating hook 23 is brought into contact with an appropriate position on the igniter case 2.

In addition, in the above explanation, the pushing distance of the operating shaft 1 is 3 mm.
Although the rotation angle for a large fire is 90° and the rotation angle for a small fire is 140°, these are merely examples and are not limited thereto.

As described above, according to the gas cock of this invention, when the operating shaft of the gas cock is rotated to the fully open gas flow position and the ignition operation is performed, the rotary core having the stopper is advanced and engaged with the stopper pin, and the operating shaft is rotated. This is designed to prevent excessive rotation, so even when the ignition means consisting of a high voltage generator that requires a large rotational force from the rotation of the operating shaft is operated in conjunction, the operating shaft can be fully opened. In addition to being able to stop at the fully open position, by removing the rotational torque to the operating shaft after rotation to the fully open position, the rotating core is moved backward and the stopper pin is no longer able to engage with the stopper pin. The operating shaft can be rotated from the fully open position to the small fire position, or from the small fire position to the fully closed position, completely freely and smoothly without any hindrance.

[Brief explanation of the drawing]

Fig. 1 is an external side view, Fig. 2 is an exploded perspective view, Fig. 3 is a central longitudinal sectional side view, Fig. 4 is a central longitudinal sectional side view, and Fig. 5 is an exploded perspective view.
6 is an elevational view showing the relationship between the ignition means, the hammer actuating hook, and the plug shaft; FIG. 7 is a side view of the plug; and FIG. Figure 7 is a sectional view taken along the line ■-■, Figure 9 is a sectional view taken along the line IX-IX in Figure 7, and Figure 10 is a fully closed, fully opened, and small fire plug in the position shown in Figure 8. Figure 11 is a diagram showing the fully closed, fully open, and small flame positions of the plug in the position shown in Figure 9. Figure 12 is a partially enlarged view of the connection between the operating shaft and the plug shaft. Fig. 13 is a partial sectional view of a part similar to Fig. 12 but rotated by 90';
15 is a diagram showing the relationship between the rotation angle of the operating shaft and the operating position. FIG. 16 is a graph showing the relationship between the operating angle of the operating shaft and the gas flow rate. 1... Operating shaft, 3... Cock body, 4
...Pilot gas outlet, 6...Gas inlet, 7...Gas outlet, 8...
Slide core, 9... Rotating core, 9b...
...Stopper, 10...Slide core pin,
12... Stopper pin, 13... Division groove, 14... Step, 15... Plug, 16... Pilot valve shaft. , 18... Hole, 19... Cut groove, 20... Seamer groove, 21... Seamer passage, 23... Hammer Actuation hook, 24...
... Spring, 27 ... Hammer, 29 ... Piezoelectric element.

Claims (1)

[Scope of utility model registration request] By rotating the plug 15 at a certain angle, the hole 18 formed in the plug 15 and the gas inlet 6 are communicated to allow the maximum gas flow rate, and the pilot valve 26 is opened to allow the pilot gas to flow out. , by further rotating the plug 15, a seamer groove 20 is formed on the outer peripheral surface of the plug 15.
In this gas cock, the seamer passage 21 for adjusting the small flame and the gas inlet 6 are communicated with each other through the gas inlet 6 to adjust the small flame. A rotary core 9 integrated with the rotary core 9 is connected to the rotary core 9, and the plug 15 is rotated by rotation of the operating shaft 1, and the rotary core 9 is advanced to open the pilot valve 26. A stopper pin 10 that engages with a stopper 9b formed in the cock body 3 is fixed to the cock body 3, and when the rotational torque to the operating shaft 1 is removed, the rotating core 9 is moved back by the elastic force of the spring 24, and the trapper pin 10 is engaged with the stopper pin 10. A gas cock characterized in that the engagement with a stopper 9b is released.